Is this assault?

Went on a date with a guy where it wasn’t even clear if it was a date. I was going over to help him with something and he was going to cook me dinner. We watched a movie and He tried making moved on me and I was okay with kissing and that was it. After dinner, he kept trying to grope me and I would physically have to stop him. He kept doing it until I just gave in. He then kept pushing to get inside my pants and do more. I told him no several times and he kept going. Eventually just gave in because it felt easier and he wasn’t listening. Things escalated way past where I told him I wanted it to go in the moment. I feel guilty about it. He put his dick in my mouth and I specifically asked him not to.

I felt like I couldn’t leave because he had closed the door to his apartment, my shoes were difficult to put on, and also there was a gun in the living room.

After the “sex” things were calm and I could leave so I did. He was really sweet and affectionate afterwards. It’s all very confusing.

So is this considered assault or did I just have a bad date?